<template>
  <chart :options="option" height="40vh" />
</template>

<script setup lang="ts">
import * as echarts from 'echarts'

let xaxisData = ['周一', '周二', '周三', '周四', '周五', '周六', '周日']
let yaxisData = [90, 80, 100, 70, 65, 69, 80]
const offsetX = 10
const offsetY = 5
// 绘制左侧面
const CubeLeft = echarts.graphic.extendShape({
  shape: {
    x: 0,
    y: 0
  },
  buildPath: function (ctx, shape) {
    // 会canvas的应该都能看得懂，shape是从custom传入的
    const xAxisPoint = shape.xAxisPoint
    const c0 = [shape.x, shape.y]
    const c1 = [shape.x - offsetX, shape.y - offsetY]
    const c2 = [xAxisPoint[0] - offsetX, xAxisPoint[1] - offsetY]
    const c3 = [xAxisPoint[0], xAxisPoint[1]]
    ctx
      .moveTo(c0[0], c0[1])
      .lineTo(c1[0], c1[1])
      .lineTo(c2[0], c2[1])
      .lineTo(c3[0], c3[1])
      .closePath()
  }
})

// 绘制右侧面
const CubeRight = echarts.graphic.extendShape({
  shape: {
    x: 0,
    y: 0
  },
  buildPath: function (ctx, shape) {
    const xAxisPoint = shape.xAxisPoint
    const c1 = [shape.x, shape.y]
    const c2 = [xAxisPoint[0], xAxisPoint[1]]
    const c3 = [xAxisPoint[0] + offsetX, xAxisPoint[1] - offsetY]
    const c4 = [shape.x + offsetX, shape.y - offsetY]
    ctx
      .moveTo(c1[0], c1[1])
      .lineTo(c2[0], c2[1])
      .lineTo(c3[0], c3[1])
      .lineTo(c4[0], c4[1])
      .closePath()
  }
})

// 绘制顶面
const CubeTop = echarts.graphic.extendShape({
  shape: {
    x: 0,
    y: 0
  },
  buildPath: function (ctx, shape) {
    const c1 = [shape.x, shape.y]
    const c2 = [shape.x + offsetX, shape.y - offsetY] //右点
    const c3 = [shape.x, shape.y - offsetX]
    const c4 = [shape.x - offsetX, shape.y - offsetY]
    ctx
      .moveTo(c1[0], c1[1])
      .lineTo(c2[0], c2[1])
      .lineTo(c3[0], c3[1])
      .lineTo(c4[0], c4[1])
      .closePath()
  }
})

// 注册三个面图形
echarts.graphic.registerShape('CubeLeft', CubeLeft)
echarts.graphic.registerShape('CubeRight', CubeRight)
echarts.graphic.registerShape('CubeTop', CubeTop)

let option = {
  tooltip: {
    trigger: 'axis',
    axisPointer: {
      type: 'shadow'
    },
    backgroundColor: 'rgba(255,255,255,0.75)',
    extraCssText: 'box-shadow: 2px 2px 4px 0px rgba(0,0,0,0.3);',
    textStyle: {
      fontSize: 14,
      color: '#000'
    },
    formatter: (params, ticket, callback) => {
      const item = params[1]
      return item.name + ' : ' + item.value + ' 个'
    }
  },
  grid: {
    left: '1%',
    right: '0%',
    top: '16%',
    bottom: '5%',
    containLabel: true
  },
  xAxis: {
    type: 'category',
    data: xaxisData,
    axisLine: {
      show: true,
      lineStyle: {
        width: 1,
        color: '#545454'
      }
    },
    axisTick: {
      show: false
    },
    axisLabel: {
      fontSize: 14,
      color: '#999'
    }
  },
  yAxis: {
    type: 'value',
    axisLine: {
      show: false,
      lineStyle: {
        width: 1,
        color: '#545454'
      }
    },
    splitLine: {
      show: false
    },
    axisTick: {
      show: false
    },
    axisLabel: {
      fontSize: 14,
      color: '#999'
    }
  },
  series: [
    {
      type: 'custom',
      renderItem: (params: any, api: any) => {
        const location = api.coord([api.value(0), api.value(1)])
        return {
          type: 'group',
          // 左中右 柱形样式
          children: [
            {
              type: 'CubeLeft',
              shape: {
                api,
                xValue: api.value(0),
                yValue: api.value(1),
                x: location[0],
                y: location[1],
                xAxisPoint: api.coord([api.value(0), 0])
              },
              style: {
                fill: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                  {
                    offset: 0,
                    color: '#00a8e0'
                  },
                  {
                    offset: 0.35,
                    color: '#006dae'
                  },
                  {
                    offset: 1,
                    color: 'transparent'
                  }
                ])
              }
            },
            {
              type: 'CubeRight',
              shape: {
                api,
                xValue: api.value(0),
                yValue: api.value(1),
                x: location[0],
                y: location[1],
                xAxisPoint: api.coord([api.value(0), 0])
              },
              style: {
                fill: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                  {
                    offset: 0,
                    color: '#05befc'
                  },
                  {
                    offset: 0.35,
                    color: '#0071bc'
                  },
                  {
                    offset: 1,
                    color: 'transparent'
                  }
                ])
              }
            },
            {
              type: 'CubeTop',
              shape: {
                api,
                xValue: api.value(0),
                yValue: api.value(1),
                x: location[0],
                y: location[1],
                xAxisPoint: api.coord([api.value(0), 0])
              },
              style: {
                fill: '#08bae7'
              }
            }
          ]
        }
      },
      data: yaxisData
    },
    {
      type: 'bar',
      itemStyle: {
        color: 'transparent'
      },
      data: yaxisData
    }
  ]
}

defineOptions({
  name: 'LFC'
})
</script>

<style scoped></style>
